Numerical study of the influence of microstructure on subsequent yield surfaces of polycrystalline materials

Zattarin, Patrick; Lipiński, P.; Rosochowski, Andrzej

doi:10.1016/j.ijmecsci.2004.07.003

Cited by 19 publications

(12 citation statements)

References 22 publications

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“…If some grain orientations are more prominent, or in other words if the polycrystal has a non-random crystallographic texture, the grains with these orientations will have a pronounced contribution to the anisotropy of the whole sample. If the texture of the polycrystal is known, a variety of methods is available to determine the plastic anisotropy, including the full-constraint Taylor model, relaxed-constraint Taylor models, the self-consistent viscoplastic model and finite element models [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A microstructure-based yield stress and work-hardening model for textured 6xxx aluminium alloys

Khadyko

Myhr

Dumoulin

et al. 2016

Philosophical Magazine

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Section: Introductionmentioning

confidence: 99%

A microstructure-based yield stress and work-hardening model for textured 6xxx aluminium alloys

Khadyko

Myhr

Dumoulin

et al. 2016

Philosophical Magazine

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“…The limits of this method are discussed in [23]. Crystal plasticity is used to find the yield surface of textured alloys in [24,25,26].…”

Section: Introductionmentioning

confidence: 99%

An experimental–numerical method to determine the work-hardening of anisotropic ductile materials at large strains

Khadyko¹,

Dumoulin²,

Hopperstad³

2014

International Journal of Mechanical Sciences

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The determination of work hardening for ductile materials at large strains is difficult to perform in the framework of usual tensile tests because of the geometrical instability and necking in the specimen at relatively low strains. In this study we propose a combination of experimental and numerical techniques to overcome this difficulty. Extruded aluminium alloys are used as a case since they exhibit marked plastic anisotropy. In the experiments, the minimum diameters of the axisymmetric tensile specimen in two normal directions are measured at high frequency by a laser gauge in the necking area together with the corresponding force, and the true stress-strain curve is found. The anisotropy of the material is determined from its crystallographic texture using the crystal plasticity theory. This data is used to represent the specimen by a 3D finite element model with phenomenological anisotropic plasticity. The experimental true stress-strain curve is then used as a target curve in an optimization procedure for calibrating the hardening parameters of the material model.As a result, the equivalent stress-strain curve of the material up to fracture is obtained.

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“…(32) using homogenization procedures. In this paper a SC approach is also adopted to perform this homogenization (for more details, see [10,11,14,[30][31][32][33][34]). Figure 1 illustrates the two-stage SC model developed in this work.…”

Section: Meso-macro Transition Schemementioning

confidence: 99%

“…The local behaviour (at the grain level) is based on the assumption of uniform deformation neglecting the formation of the dislocation microstructure. These approaches permit to predict correctly the yield surface, the crystallographic texture linked to the plastic deformation, the intergranular stresses due to the initial and induced anisotropy during monotonic loadings [14][15][16][17]. Nevertheless, this kind of description fails to reproduce the mechanical behaviour during changing strain paths [18].…”

Section: Introductionmentioning

confidence: 99%

Micromechanical modelling of the elastoplastic behaviour of metallic material under strain-path changes

et al. 2009

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International audienceA two-level homogenization approach is applied for the micromechanical modelling of the elastoplastic material behaviour during various strain-path changes. A mechanical description of the grain is developed through a micro-meso transition based on a modified elastoplastic self-consistent approach which takes into account the dislocation evolution. Next, a meso-macro transition using a self-consistent model is used to deduce the macroscopic behaviour of the polycrystal. A correct agreement is observed between the simulations and the experimental results at the mesoscopic and macroscopic levels

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Numerical study of the influence of microstructure on subsequent yield surfaces of polycrystalline materials

Cited by 19 publications

References 22 publications

A microstructure-based yield stress and work-hardening model for textured 6xxx aluminium alloys

A microstructure-based yield stress and work-hardening model for textured 6xxx aluminium alloys

An experimental–numerical method to determine the work-hardening of anisotropic ductile materials at large strains

Micromechanical modelling of the elastoplastic behaviour of metallic material under strain-path changes

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